Submission #32264

#	Time	Username	Problem	Language	Result	Execution time	Memory
32264		dqhungdl	Bosses (BOI16_bosses)	C++14	100 / 100	653 ms	2464 KiB

bosses

#include <bits/stdc++.h>
using namespace std;

int n,res=1e9,h[5005],Q[5005];
vector<int> g[5005];

void BFS(int u)
{
    for(int i=1;i<=n;i++)
        h[i]=0;
    h[u]=1;
    Q[1]=u;
    int l=1,r=1;
    while(l<=r)
    {
        int u=Q[l++];
        for(int i=0;i<g[u].size();i++)
            if(h[g[u][i]]==0)
            {
                Q[++r]=g[u][i];
                h[g[u][i]]=h[u]+1;
            }
    }
    if(r==n)
    {
        int sum=0;
        for(int i=1;i<=n;i++)
            sum+=h[i];
        res=min(res,sum);
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    //freopen("BOSSES.INP","r",stdin);
    cin>>n;
    int k,x;
    for(int i=1;i<=n;i++)
    {
        cin>>k;
        while(k--)
        {
            cin>>x;
            g[x].push_back(i);
        }
    }
    for(int i=1;i<=n;i++)
        BFS(i);
    cout<<res;
}

Compilation message (stderr)

bosses.cpp: In function 'void BFS(int)':
bosses.cpp:17:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=0;i<g[u].size();i++)
                      ^

• Subtask 1: 22 / 22
• Subtask 2: 45 / 45
• Subtask 3: 33 / 33